add warning if folder exists in target path (#53)

* add warning if folder already exists in target path

* separate ask folder functions and add constants

* move options into new target folder function

* fix for target folder path check for windows

Signed-off-by: Jimmy Wu <[email protected]>

Author: jimmy1wu

Diff for: src/commands/generateProject.ts

@@ -60,9 +60,7 @@ export async function generateProject(): Promise<void> {
       return;
     }
 
-    const targetFolder = await prompts.askForFolder({
-      openLabel: "Generate into this folder",
-    });
+    const targetFolder = await prompts.askForTargetFolder(artifactId);
     if (targetFolder === undefined) {
       return;
     }

Diff for: src/constants.ts

@@ -28,3 +28,8 @@ export const OPEN_NEW_PROJECT_OPTIONS = {
 };
 
 export const EXTENSION_USER_AGENT = "Visual Studio Code";
+
+export const CONFIRM_OPTIONS = {
+  YES: "Yes",
+  NO: "No",
+};

Diff for: src/util/vscodePrompts.ts

@@ -1,7 +1,8 @@
 import * as vscode from "vscode";
+import * as path from "path";
 import { OpenDialogOptions, Uri, window, QuickPickItem } from "vscode";
-import { MP_SERVER_LABELS, MP_VERSION_LABELS } from "../constants";
-import { trimCapitalizeFirstLetter } from "./util";
+import { MP_SERVER_LABELS, MP_VERSION_LABELS, CONFIRM_OPTIONS } from "../constants";
+import { trimCapitalizeFirstLetter, exists } from "./util";
 
 export async function askForGroupID(): Promise<string | undefined> {
   return await vscode.window.showInputBox({
@@ -160,3 +161,32 @@ export async function askForFolder(customOptions: OpenDialogOptions): Promise<Ur
 
   return undefined;
 }
+
+export async function askForTargetFolder(artifactId: string): Promise<Uri | undefined> {
+  const customOptions: OpenDialogOptions = {
+    openLabel: "Generate into this folder",
+  };
+
+  const targetFolder = await askForFolder(customOptions);
+
+  if (targetFolder && (await exists(path.join(targetFolder.fsPath, artifactId)))) {
+    const selection = await askConfirmation(
+      `Folder ${artifactId} already exists inside the ${targetFolder.fsPath} folder. Contents of the ${artifactId} folder and the generated MicroProfile Starter Project will be merged. Are you sure you want to generate into this folder?`
+    );
+    if (selection === CONFIRM_OPTIONS.YES) {
+      return targetFolder;
+    } else if (selection === CONFIRM_OPTIONS.NO) {
+      return await askForTargetFolder(artifactId);
+    }
+    return undefined;
+  }
+
+  return targetFolder;
+}
+
+export async function askConfirmation(message: string): Promise<string | undefined> {
+  return await vscode.window.showWarningMessage(
+    message,
+    ...[CONFIRM_OPTIONS.YES, CONFIRM_OPTIONS.NO]
+  );
+}